Simply speaking, you need to know how to handle your numbers well. Given an integer, what is the largest digit present in that number?

The input file **DATA2.txt** will contain 5 lines, integers 0 ≤ `N` ≤ 1,000,000.

The output file **OUT2.txt** will contain 5 lines, each being a single integer 0 ≤ `n` ≤ 9 – the largest digit present in the corresponding input number.

Sample Input:

```
1
10
102
1025
9999
```

Sample Output:

```
1
1
2
5
9
```